#display {
    width: 480px;
    height: 432px;
    display: block;
    outline: 5px solid #67cd5d;
    margin: 30px auto;

    image-rendering: -moz-crisp-edges;
    image-rendering: -webkit-crisp-edges;
    image-rendering: pixelated;
    image-rendering: crisp-edges;
}

#io,
#stack {
    float: left;
    height: 400px;
    overflow-y: scroll;
}

#out {
    float: left;
    margin-right: 10px;
}

#dbg {
    display: none;
}